chore(deps): suppress unnecessary peerDeps warning

[ikatyang]

• peerDependenciesMeta is supported in npm, pnpm, yarn, and yarn 2
• pug is not a necessary peer dependency, it should not need to be installed if lang="pug" is not used

[codecov]

Codecov Report

Merging #974 into dev will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev     #974   +/-   ##
=======================================
  Coverage   63.97%   63.97%           
=======================================
  Files         175      175           
  Lines        4786     4786           
  Branches     1413     1413           
=======================================
  Hits         3062     3062           
  Misses       1652     1652           
  Partials       72       72           

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[elevatebart]

Oh thank you @ikatyang!
Great PR! simple review, and I did not know about this peerDependenciesMeta.

You made my day